When setting up a builder's level, how should the leveling screws be adjusted?

When setting up a builder's level, the leveling screws should be adjusted by turning them in opposite directions. This method is effective because it allows for precise adjustments to the tilt of the level. By turning one screw in one direction, you can lift that side of the level, while turning the other screw in the opposite direction lowers that side. This technique helps to achieve a level position quickly and accurately, ensuring that the instrument is perfectly leveled for any measurement.

Using this approach, adjustments can be made to both raise and lower the level, allowing for fine-tuning until the bubble in the level vial is centered, indicating that the instrument is horizontally level.